Bolt anchor applying tool



oct. 7, 1947.

`w. G. HoLLwARTH 2,428,459

BOLT ANCHOR APPLYING TooL Filed Dec. 14, 1944 2 sheets-sheet 1 1v .l 60 J6 l. JZ Wd l 64 Waas/m awr@ www@ Patented Oct. 7, 1947 UNITED STATES PATENT OFFICE pour ANCHOR APPLYING Toor. William G. Houwarni, Merchantviue, N. J.

Application December 14, 1944, Serial No. 568,134

Claims. 1

My invention relates to bolt anchor applying tools and more particularly to tools for applying bolt or screw Ianchors of the type which includes an internally threaded sleeve, spreadable side portions and a crown head and which are adapted to be inserted in a hole in a support and secured therein. The tool of the present invention is especially suited for use with bolt or screw an- -chors of the type known in the trade as toggle screw anchors.

The apparatus heretofore available for applying lbolt or screw anchors of the type heretofore referred to, other than that shown in rny prior application for Letters Patent for Bolt anchor applying tools, filed October 2'?, 1944, Serial No. 560,675, has not proven satisfactory in use. The shortcomings of the prior apparatus were due in part to the difficulty in the manipulation thereof and the lack of certainty of the operation of such apparatus. The apparatus available for applying the anchors prior to that shown in my application for Letters Patent aforesaid did not position the side portions of the fasteners fo-r proper gripping, was slow in its action, and did not provide for a quick and accurate applying of the anchors.

In accordance with the present invention, a bolt anchor applying tool is provided which is simple and sturdy in construction, is quick in its action, is positive in its mounting of the anchor, provides for the spreading of the side portions of the anchor to the desired extent for most effective gripping and carries out its functions with a minimum of effort on the part of the operator.

In accordance with the present invention also, a power operated bolt anchor applying tool is provided which is highly elective in use.

Other advantageous features will be apparent from the specification and claims.

'I'he nature and characteristic features of the invention will be more readily understood from the following description, taken in connection with the accompanying drawings forming part hereof, in which:

Figure 1 is a View in side elevation of an anchor applying tool in accordance with the present invention, parts being broken away to show the details of construction;

Fig. 2 is a view of the tool shown in Fig. 1 as seen from the left hand side;

Fig. 3 is a vertical sectional view taken approximately on the line 3-3 of Fig. 1;

Figs. 4 and 5 are fragmentary vertical sectional views taken approximately on the line d-ll of Fig. 3 and showing diiferent operating positions; and

Fig. 6 is a fragmentary sectional view through a portion of the handle showing the valve for Y description and drawings herein are illustrative merely, and that various modifications and changes may be made in the structure disclosed without departing from the spirit of the invention. v

Referring more particularly to the drawing a bolt or screw anchor l@ of the type for which the applying tool is particularly adapted is shown in detail in Figs. 1 and 3. The bolt anchor or fastener lil preferably includes an internally threaded sleeve il from which expansi'ble and deformable side strip portions I2 extend to a head I3. The side strip portions l2 preferably have bend lines or creases E2a formed thereon to start the bending of the side strips l2 in the desired direction upon the application of a compressive force thereon. The head i3 preferably includes a collar ist with outwardly or radially extending wings or lugs l5. The bolt anchor IB is adapted to be inserted in any desired type of support l5 of wood, plaster, tile, masonry, sheet material, or the like, and in any desired direction, horizontally or vertically up or down, in a hole Vl drilled or bored in the support i6 for the purpose. When the bolt anchor lli is secured in position the lugs or wings i5 are disposed on the outer surface of the support l5 with the outer ends of the lugs or Wings l5 extending inwardly into the outer surface of the support It in gripping relationship to aid in preventing rotation of the anchor I0 after the securing thereof.

The anchor applying tool in accordance with the present invention and as illustrated in the drawings preferably includes an anchor compressing element comprising an actuating stem 2i! externally threaded at its inner end 2l and secured at its outer end in an actuating head 22. The actuating head 22 is knurled or otherwise roughened on its peripheral edge 23 for aidingr in turning the same with the fingers when desired. The end portion 2| is adapted to engage with the threads in the sleeve i l upon turning of the head 23. Spaced from the head 22 a disc or washer 24 is provided, slidable on the stem and stopped in one direction by a shoulder 25 formed on the stern 20 by enlarging the same, as at 26, at the end toward the actuating head 22, or in any other desired manner. The actuating head 22 has an inner face 2l for actuating engagement as hereinafter explained. l v

The anchor applying tool also includes power inder 58 preferably includes a cylindrical tube" held in position on the casing 55 and with a handle 50 held in assembled relationship with re"' spect thereto, studs 5l being provided for this purpose. The cylinder 58 has fluid connections to the opposite ends thereof for supplying Y under pressure as hereinafter pointed'out. A piston 65 is provided within the cylinder 58, the

piston 65 having a piston rod 66 extending there# from. l

In order to actuate the piston 65 an air supply line 61 is connected to they handle 6U' and a manually actuated valve member 68 is provided for controlling the pressure conditions onopposite sides of the piston 65. y

The valve member 68 is mounted in a ported sleeve 69, has spaced plug portions 68a,v and 68h has a spring 16 pressing against one end thereof and has a stem portion II projecting therefrom for engagement by an actuating lever 1'2 which extends outwardly from the handle portion. 60 for engagement by the thumb of the userl A The sleeve 69 has a fluid connection 13, with branches 15a and lh, connected to the air supply line 67, has4 a passageway I4 in. communication with the atmosphere, andhas iiuidY connections 15 and 16 in communication with theE up-V per and lower ends, respectively of thel cylinder 58;

For the purpose of actuating th'e head 22, each of the compartments 52 has mountedtherein a cam 86 of the character illustrated in Figs. 4 i

and 5,V the cams being actuated from thez piston rod 66 by cross head members 6I extending thereto, to which the cams 8i!A are pivotally connected. Each cam 8&9Y is adapted toebear against or ride on a lower roller 82 mounted on-a. spindle 83 carried in the walls and 55y and to actuate a follower roller 84 carried on a spindle- 851 The spindles 85 are adapted to slide in suitable slots 86, formed in walls 55: and 56 of the casing Y55;v The inner ends of the spindlesz 85 are adapted to engage the lower face 21 of the actuating head 2,2 for moving the same upwardly tobend the" side strips I2 of the bolt anchor I!)` the desired position.

The mode of operation of the applying; tool will now be pointed out.

The support I6 is prepared by having'` a hole' I1 drilled or bored therein at theiloc'ationwhere it is desired to secure the bolt or screwf anchor I 0; The bolt or screw anchorl may` then, bex mounted on the stem 2Il-with the enlarged pore' 4tion 26 of the stem extending through thefcollar- Il and with the threaded inner end 2:'I-l in en`-- gagement with the threads in the sleeve: II'. The head I3 of the anchor I0.ispreferably'positioned' with the wings or lugs I5 in engagement withithedisc or washer 2li; Turning of the head 22u1 to;Y obtain the desired character of mountinggis facilitatedby theroughenedfsurfaceof th'e peripheral: edge V23.

If desired the bolt or. screw anchor lfilv` may.v first be positioned in the holeV I;'I andrthei'sterrr` 20 inserted and positioned; IVheV locationioffthe 4 Y Y disc or washer 24 with respect to the shoulder 25 will indicate whether the threaded end 2I is properly in engagement with the sleeve I I thereby avoiding the possibility of injury to the threads on the end 2| or in the sleeve Il during the securing of the bolt anchor or fastener I0.

The casing 50 is then brought into position with theistem 20 inthe slot 54, with the wall 53 above or outside the `disc or washer '24 and with. the spindle endsr adjacent theV face 21 of the head 22T'.

The valve member 68 in its normal position admits air under pressure through the branch '13a the passageway 'I5 to actuateV and retain the piston 65 in its down position so that the spindle ends 85 willi allow the stem 20 to project its maximum distance outwardly from face 53 of casing 5U for engagement of its threaded end with a non-collapsed fastener.

When it is desired to complete the Vsecuring of the fastener I0 the lever 12' is depressed against the force of the spring 76. This moves the valve member 68 to a position where the plug 68a thereof closes the branch 13a to cut off further delivery of pressure fluid through the line 'I5 to the upper end of the cylinder 58r and to connect the line 'I5 to the atmosphere through the port 14. At .the same time pressure fluid is supplied through branch 13b the line 76 to the'lower en'd ofthe cylinder 58 for driving the piston 65 up-` wardly in the cylinder 58. Upon the upward movement of the piston 65 the piston rodv 66A actu-i ates the cross head 8I which in turn operates theV ment with the support I6 as shown in Fig. 1'. Thedistance the sleeve portion IIk is moved is thus regulated by the cams all which prevents deeA formation of the side stripportions.` l2 beyond their most effective securing positions.

Upon the completion of the mounting of the fastener IIlI the lever 'i2 .is released. The valve 66 returns to itsv initial position inl which the plug 681)'. closes the branch '13b and opens line I6 to exhaust port'm, and the plug 68a cuts offline 'I5 from` exhaust. port 'ill and again' connects it tothe branch 13a whereby the piston 65 is moved downwardly so that the spindle ends 85 are with# drawnv fromA their` engagement with the face 21x of the head 221. Thehead 22Y may thenv be turned' by hand to unscrew it-I from the fastener4 I0 and the casing 55 may then be removed' andV isrea'dy for use inmounting another fastener I0.

I-claim-z f 1:.. In apparatus for securing a bolt anchor in. a support, a casing, a Viiuid pressure responsive" member movably mounted with; respectfto` said! casing,V manually actuated valveV means foncontrollingJ the movement of thev fluid pressure refy sponsive' member,` fixedv abutment meansl iri= saidcasing, slidably mounted means in said' casing', cam means" connected toy said fluid responsive means and in engagement with said abut-'menti means andsaidslidably'mounted means for actuatingY said slid'ablymounted: means, and means actuat'ed'byf said slidabl'y mounted means for engaging the. bolt anchor infsecuring relationship;

Y 2;k In apparatus fori securing a bolt anchor in V:a support, a casinga fluid pressure responsiveU member movably mounted with respect to said casing, manually actuated valve means for controlling the movement of the fluid pressure responsive member, a fixed abutment in said casing, an actuator member activated by said fluid responsive member and slidably mounted in said casing for movement therein, a member having diverging face portions respectively in engagement with said abutment and in actuating en gagement with said actuator member, and means actuated by said actuato-r member for securing engagement with the bolt anchor.

3. In apparatus for securing a bolt anchor in a support, a casing, a cylinder xedly mounted with respect to said casing, a piston reciprocable in said cylinder, manually actuated valve means for controlling the movement of the piston in the cylinder, a fixed abutment in said casing, a slidably mounted actuator member in said casing, a cam member actuated by said piston and interposed between said abutment and said slidably mounted member and in engagement therewith for actuat ing said slidably mounted member, and means actuated by said slidably mounted member for engaging the bolt anchor in securing relationship.

4. In apparatus for securing a bolt anchor in a support, a casing, a cylinder xedly mounted with respect to said casing, a piston reciprocable in said cylinder, manually actuated Valve means for controlling the movement of the piston in the cylinder, a. xed abutment in said casing, a slidably mounted actuator member in said casing, a

cam member having diverging face portions one of which is in engagement with said abutment and the other of which is in actuating engagement with the slidably mounted member, a, connecting member between said piston and said cam member and means actuated by said slidably mounted member for engaging the bolt anchor in securing relationship.

5. In apparatus for securing a bolt anchor in a support, a casing, a. cylinder xedly mounted with respect to said casing, a piston reciprocable in said cylinder, manually actuated valve means for controlling the movement of the piston in the cylinder, X-ed abutments in said casing, slidably mounted members in said casing, spaced cam members in said casing connected to said piston and interposed respectively between one of said fixed abutments and one of said slidably mounted members for actuating said slidably mounted members, and means actuated by said movably mounted members for engaging the bolt anchor in securing relationship.

WILLIAM G. I-IOLLWARTH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

